“There is increasing evidence through comparisons of what’s happening in different countries and in different states, in terms of mask usage and mandates, that masks help slow transmission of COVID-19. Of course, it would be ideal if everyone had access to high-quality masks, but masks do not have to be 100% effective to reduce one’s exposure to virus. At this point, any reduction helps. I think it is becoming clear that the benefits to wearing face coverings outweigh any downsides.”
— Linsey Marr, PhD, Professor of Civil and Environmental Engineering, Virginia Polytechnic Institute and State University
Quote originally posted here.